CAJ | 학술논문

文章根据简单源方法（源汇分布法）中不规则频率的产生机理，在内部流场中引入一个虚拟阻抗封闭曲面用于吸收声振能量，消除内部流场的共振现象，以此消除不规则频率。将该方法与现有的水弹性力学简单源求解方法相结合，应用声介质中水弹性力学计算程序THAFTS求解了一球形浮体涨缩振动和刚体平动的声阻抗，通过与解析结果的比较，验证了文中所述的方法能较好地消除不规则频率。同时进一步计算分析了内部虚拟阻抗曲面的大小以及曲面上声阻抗的大小对消除不规则频率效果的影响，为该方法的实际应用提供了理论指导。
문장근거간단원방법（원회분포법）중불규칙빈솔적산생궤리，재내부류장중인입일개허의조항봉폐곡면용우흡수성진능량，소제내부류장적공진현상，이차소제불규칙빈솔。장해방법여현유적수탄성역학간단원구해방법상결합，응용성개질중수탄성역학계산정서THAFTS구해료일구형부체창축진동화강체평동적성조항，통과여해석결과적비교，험증료문중소술적방법능교호지소제불규칙빈솔。동시진일보계산분석료내부허의조항곡면적대소이급곡면상성조항적대소대소제불규칙빈솔효과적영향，위해방법적실제응용제공료이론지도。
An imaginary closed impedance-surface was introduced into the “inner fluid domain”to absorb oscillatory energy according to the mechanism of causing irregular frequencies in simple-source formula-tion, and that the resonance phenomena and irregular frequencies were eliminated simultaneously. Combin-ing this method with simple-source formulation, the acoustic impedances of breathing vibration and rigid translation of one sphere were computed by using 3-D hydroelasticity programme THAFTS. The validity of this method to eliminate irregular frequencies was checked by comparing with analytic results. It was anal-ysed that the influence of the size and the impedance value of the imaginary impedance-surface to elimi-nat irregular frequencies, and these work will provide theoretical direction for practical applications of this method.